Vaughn (Bridgette Wilson) would never dream of consorting with one of her third-graders, but in a case where one of them happens to be pushing thirty, this blonde bombshell will make an exception. At least the man-child in question waits until he's moved on to the fourth grade before pursuing her in earnest!

Sheba Hart, Notes on a Scandal (2006)

In the throes of her midlife crisis, Hart (Cate Blanchette) succumbs to the advances of her 15-year-old art student, ultimately teaching him way more than about anatomy than most kids learn till college. It's wrong to condone a crime, but who among us could resist Blanchette at her most ethereally radiant? Let that person cast the first stone.